+/* Allocate some counters. Repeatable per function. */
+extern int coverage_counter_alloc (unsigned /*counter*/, unsigned/*num*/);
+/* Use a counter from the most recent allocation. */
+extern tree tree_coverage_counter_ref (unsigned /*counter*/, unsigned/*num*/);
+/* Use a counter address from the most recent allocation. */
+extern tree tree_coverage_counter_addr (unsigned /*counter*/, unsigned/*num*/);
+
+/* Get all the counters for the current function. */